For your Robin Thicke costume, luckily the R&B singer chose to dress up like Beetlejuice, so all you'll need to replicate the outfit is a costume of Michael Keaton's movie character, with a black shirt.

But, if you're after a more authentic Miley Cyrus look, HalloweenCostumes.com has put together a DIY guide for replicating the ensemble from the "We Can't Stop" video, complete with french-fry-covered skull and money sandwich.